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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_007_020">&nbsp;</a>NAME</h4><blockquote>
isascii - test for a 7-bit US-ASCII character
</blockquote><h4><a name = "tag_000_007_021">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="ctype.h.html">ctype.h</a>&gt;

int isascii(int <i>c</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_007_022">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>isascii()</i>
function tests whether
<i>c</i>
is a 7-bit US-ASCII character code.
<p>
The
<i>isascii()</i>
function is defined on all integer values.
</blockquote><h4><a name = "tag_000_007_023">&nbsp;</a>RETURN VALUE</h4><blockquote>
The
<i>isascii()</i>
function returns non-zero if
<i>c</i>
is a 7-bit US-ASCII character code between 0 and octal 0177 inclusive;
otherwise it returns 0.
</blockquote><h4><a name = "tag_000_007_024">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_007_025">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_026">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_027">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_028">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="ctype.h.html">&lt;ctype.h&gt;</a></i>.
</blockquote><h4>DERIVATION</h4><blockquote>
Derived from Issue 1 of the SVID.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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